Hi! I am trying to flash my Powercolor HD 7970 (AX7970 3GBD5-2DHE/OC) with a compatible mac efi rom. I used the script provided at nektas.org(7xxx creating rom test) and flashed it but it didn't work. Tried to register an account at nektas.org but still have not received the activation email. I tried flashing all the HD 7970 roms on the 7xxx forum page and even a r9 280x rom but to no avail. Could someone please help me maybe generate a rom from my original one or provide a link to a suitable rom to flash? Thanks! (Macrumors doesnt allow .rom files so i have zipped it)
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7970 efi rom
- Thread starter Irvingoh999
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Please post the screen capture of the terminal when you running the fixrom script. Usually some hit at there.
Also, did you check your card's ROM is 128k in size?
Last login: Wed Sep 5 21:45:47 on console
Irvins-Mac-Pro:~ irvingoh$ cd /Volumes/7970
Irvins-Mac-Pro:7970 irvingoh$ ./makerom.sh --efifile=7950mac.efi --romfile=efiromheader.rom --originalrom=cardname.rom --devid=6978
running on 7950mac.efi, efiromheader.rom with devid 6978
Patching files 7950mac.efi, efiromheader.rom for device-id 0x6978
Successfully patched efi file
Successfully patched efi rom file
Orig Size = 125440
Comp Size = 47590
47590+0 records in
47590+0 records out
47590 bytes transferred in 0.105497 secs (451102 bytes/sec)
EFI part is ready at 6978.efipart.rom
orig size - 65536
65536+0 records in
65536+0 records out
65536 bytes transferred in 0.207910 secs (315213 bytes/sec)
Before:
OpRom (size=65536, indicator_offset=0x22d, indicator=0x0, checksum=0x0)
OpRom (size=48128, indicator_offset=0x31, indicator=0x80, checksum=0x0)
RawData (size=17408)
Traceback (most recent call last):
File "fixrom.py", line 110, in <module>
op_rom.fix()
File "fixrom.py", line 90, in fix
self.data[-1] = chr(0x100 - sum)
ValueError: chr() arg not in range(256)
the rom is ready at cardname.rom.efi.rom
^^ Above is the outcome. And yes both the original rom and the refi patched rom are 128kb in size.
Wrong Device ID, it should be 6798 for HD7970, not 6978
[doublepost=1536158941][/doublepost]
MacOS and Windows use different standard to define 1k (1024 vs 1000).
131k x 1000 / 1024 = 128k
Reran the script and it worked!! Thanks! However, after flashing, when I went back to macOS, The HDMI was not displaying anything. So I went back to windows and it was working on windows. I did a SMC and PRAM reset but still doesn't work. I would try using another display output but I don't have the right adapter as of now. Could it be something to do with the port mapping. Im not good with editing the rom so ill attach it and hope someone would help. (Note: The HDMI port was working before I flashed it with the EFI edited rom). Thanks again!I think that the device ID is 6798 .. ( not 6978 ) at least it is on my Sapphire DUAL-X 7970
h9826790 always beats me to the punch
Run the script again.
That's exactly because you are now using a wrong framebuffer (port mapping issue) for your card. Nothing you can do about it (if you want to keep the boot screen).
Obviously your card has different port layout than the Sapphire HD7950 Mac Edition card. The framebuffer from the Mac EFI is 100% sure not fit your card. And in most of the case, the HDMI port will be disabled.
If you don't need boot screen for every single boot. The best way to use the card is keep the BIOS switch on the PC BIOS. Then all ports will work. And only flip the switch to Mac EFI BIOS when you really need the boot screen.
When tested, I found that my MiniDisplay ports(only tested the first one which was closest to the end of the card) only worked when HDMI was not plugged in so only either of the ports work at the same time. The second DVI port did not work on the mac Bios or the PC one. Maximum number of screens I can get working at the same time was 2. Trying to get 3 as I have a triple monitor setup.
UPATE: I found a combination which allows for 3 displays, since all my monitors are HDMI, I used 2 Mini-displayports and 1 DVI port. For some reason I couldn't use HDMI natively as one of the 3 ports but when using only 2 monitors the HDMI works. When using the Mini-displayports, I used one active and one passive adapter to convert to HDMI. Ultimately the best option is to use all Mini-displayports with active adapters and a DVI port.Is there a workaround or mod to fix this? (Issue only occurs in macOS, maybe modifying the rom or frame buffer)
Last edited:
Hello everyone,
I have a problem with the flashing of my graphics card. I have followed the instructions of netkas and I have a boat screen.
netkas.org instructions:
http://forum.netkas.org/index.php/topic,5619.0.html
in about my Mac is now Radeon HD 7950 and not 7970. How can I change this?
I've uploaded my ROM.
Many thanks for your help
Chris
I have a problem with the flashing of my graphics card. I have followed the instructions of netkas and I have a boat screen.
netkas.org instructions:
http://forum.netkas.org/index.php/topic,5619.0.html
in about my Mac is now Radeon HD 7950 and not 7970. How can I change this?
I've uploaded my ROM.
Many thanks for your help
Chris
That's purely cosmetic. If you have no idea how to change that, better leave it as is.